Smoking pipe



Nov*l l5, 193B.` N. K. .JELLINGHAUS SMOKING PIPE Original Filed July l2, 1954 INVENToR.' NORMAN KELLINGHAUS.

Ill'.

Patented Nov. 15, 1938 SMOKING PIPE Norman K. Jellinghaus, Philadelphia, Pa.

Application July 12, 1934, Serial No. 734,729 Renewed June 16, 1937 foiaims. 01.V iai- 184) My invention is a knife type cleaning device for smoking pipes. Such devices cleanse the bowl by a cutting or scraping action with the side or bottom walls or both. They have been generally troublesome because lacking in practical form of cutting blade and practical means of operating them. My invention aims to eliminate both of these troubles and to constitute the device a practical machine in a true sense.

In the first place, I form the knife of high grade steel of relatively narrow blade form yet quite sharp but of generous cross section whereby the blade though'stiff and sharp, through its narrowness conforms accurately to the carbon coated walls with which it is supposed to coact, This section of blade I carry radially across the bottom wall of the bowl and then axially along the side Walls of the bowl, forming the walls of the bowl cylindrically for this purpose.

In the second place, I provide means for rotating this knife comprising a shank projected axially through the bottom wall of the bowl, and I provide this shank with an axial elongation capable of being extended and collapsed to project an operating head thereof from the bottom of the bowl for convenient operation or to house that head within the general contour of the bottom of the bowl out of the way and out of .side sight. This shank is journaled in a metallic bushing itself fixedly threaded into the bottom of the bowl.

Thirdly, I improve the general draft conditions of the pipe by interconnecting the bowl and the stem through an annular orifice concentric with the rotatable shank of the cleaner and taking the place of the usual side or central orifice, particularly the central orifice, the position of which is now occupied by the shank of the cleaner. This orifice I form of a cross section the aggregate area of which is substantially that of the draft orifice of the stem whereby the draft is distributed. A tine depended from the radial arm of the knife type cleaner projects into this orifice and when the cleaner is operated, cleans the orifice at the same time that the bowl is cleaned.

Referring to the accompanying drawing- Figure 1 is an axial cross section of the bowl 5 and stem in principal part showing a mounting for the knife type cleaner and the draft orifice in axial crosssection along with the bowl and the stem.A

Figure 2 is an axial cross section of thestem in 55,; the plane of transaxialcross, section of the bottom of the bowl taken substantially on line 2--2 of Fig. 1.

Figure 3 is a view of the botto-m portion of the bowl particularly in axial cross section to display the elongation of the shank of the cleaner to permit it to be manipulated.

Figure 4 is a view of the stem portion of the pipe and substantially in the same section but in perspective the better to portray the annular and circular form of the mounting and operating parts of the cleaner and of the draft orifice, the shank of the cleaner being shownin collapsed form.

Figure 5 is a top plan view of the bowl.

Figures 6 and '7 are sections taken axially of the bowl showing modifications of the structure of the bottom of the bowl.

The bowl is designated IB, the stem II. The side walls of the bowl are designated I2, the bottom walls I3, and the stem orifice by I4. This stem is of the form covered in my Patent No. 2,106,747, dated Feb. l, 1938. It embodies a metallic barrel I5 the interior of which constitutes the stem orifice I4 and also the chamber of a piston type force pump. In Fig. l the piston of this pump is designated I6 and the piston rod I 'I. So far as its relation to this case is concerned, suffice it to say that when the rod I'I (which is directly connected to the mouthpiece I8) is drawn from the stem II, the piston I6 cleanses the chamber and orifice I4 of-its condensed content.

The annular orifice I9 constitutes the sole and certainly the principal draft connection between the bowl II! and the stem orifice I4. The annular nature of this orifice can be clearly seen both in Figs. 4 and 5. Its bottommost portions 20 are somewhat enlarged in cross section and communicate directly with the stem orifice or chamber I4 by way of port 2l in the walls of the tube I5. The transaxial cross section of the orifice I9 at the bottom of the bowl, however, is constricted and is preferably not consequentially different from the cross section of the stem port 2|, the relations of the cross sections, whether the same or inconsequentially different, being such that the draft is annularly distributed substantially uniformly around the bottom of the bowl. A lesser orifice section is best.

This form and distribution of the draft aperture leaves the center of the bottom available for the mounting of the knife type cleaner. This mounting is in the form of a bushing 22 externally shouldered at its upper end and internally shouldered. Vat4v its lower end. The bushing is.

threaded axially through the bottom of the bowl from the inside in such manner that its external shoulder abuts a portion of the bottom wall and fixes it in axial position. Within this bushing 22 is journaled an axially extensible shank 23 for the knife type cleaner. This shank at its upper end is provided with an external shoulder and its lower end with an operating head 24 whereby it may be turned. The shank is assembled into the bushing from its open upper end and the lower end of the shank projects through the lower end of the bushing where head 24 is joined thereto by pin connection 25 permitting easy placement and removal for assembly and dis-assembly.

Joui'naled in the upper end of the bushing 22 is a knife type cleaner 26. The shank 21 of this cleaner is angular and is fitted slidably in a complemental angular socket 28 of the bushing shank 23 whereby rotation of the shank 23 rotates the knife 26. The knife 26 is also journaled in the upper end of bushing 22. This journaling is by means of a journal bushing 29 threaded into the shouldered upper end of the'bushing 22 and carrying the revolving journal bearing 30 (see Figs. l, 4 and 5) fitted on tothe angular knife shank 21 (see Figs. 2 and 3). Shank 21, bushing 29 and journal 30 are constituted a unit by a confining washer or spring 3| force tted around the angular shank 21 and abutting by its margins the lower end of the bushing 26. Thus these three parts, the knife 26, the bearing 29 and journal 39, may be applied to and removed from bushing 22 as a unit by threading bushing 29 into and out of the upper end of bushing 22. To facilitate this assembly the` bushing 29 is provided with sockets 32 for a small spanner wrench.

The knife 26 is comprised of radial portions 33 radially traversing the bottom wall I3 and an integral axial portion 34 coacting with the carbon coated side walls I2 of the bowl. The shank 21 and the portions 33 and 34 are an integral piece of right angular formation of the general configuration of the letter Z. 'I'he portions 33 and 34 however are not of regular polygonal form but are of flattened polygonal form generally trapezoidal as clearly appears in Figs. 4 and 5. The opposed edges are beveled and sharp. The blade is relatively narrow readily conforming therefore to the large curvature of the side walls of the bowl I2. Yet the general cross section is stocky and the blade as formed of high grade steel quite stiff.

The under side of the radial portion 33 of the blade is provided with the tine 35 which projects into the annular orifice I9 and to a sufiicient depth therein to thoroughly cleanse the aperture when the cleaner 34 is rotated. Indeed, this depth is such that tine 35 reaches into the port 2I by which the annular orifice I9 communicates with the stern orifice I4, whereby it may also cleanse this port. To this end orifice I9 overlies port 2l and the side walls of port 2I are cut away in such fashion as to permit tine 35 to rotate therethrough when the knife 26 is turned. To facilitate the formation of orifice I9 and to aiiord it the difference of cross section between its bottom 20 and its upper end, the bottom wall I3 of the bowl is constituted jointly by the iiush upper faces 36 (see Fig. 5) of the bushing and journal 29-30 and of a surrounding ring 31. This ring 31 fits closely around the upper end of bushing 22, is at its upper face flush with the faces 36 of members 29 and 30, and has an outer periphery of a dimension Vwhich and lighting and smoking it by drawing through the aperture I9. The draw is uniformly distributed and the smoking excellent all the way to the bottom of the charge. The smoke complete, one grasps the head 24 by the thumb and forefinger, extends it from the position in Fig. 1 to the position in Fig. 3, and rotates itV one or two complete revolutions, thereby loosening the residue of the charge, whereupon the residue may be freely dumped.

The act of cleansing the bowl of residue not only scrapes the side walls of the bowl to an extent permitting the determinate carbon residue desired, but also by the action of tine 35 cleanses the orifice I9 from which the removed material passes into the port 2I and from which latter residue and condensation is removed by the pump plunger I6. The knife 26 when the pipe is new preferably lies a determinate distance from the side wall I2, such for example, as the distance 38 whereby the bowl is coated with carbon or caked, as is commonly said, to a depth of a small frac-Y tion of an inch before the knife begins actually to scape the side walls of the bowl. After the carbon caking has proceeded to this depth, the knife will accurately maintain the bowl of uniform open diameter.

Figure 6 shows the structure wherein the ring 31 is integral with the bushing 22. Figure 7 shows the construction where the ring 31 is inte-l gral with the bowl I0. In this instance the bowl cleaner is illustrated without a stem ejector. In such case the stem orifice I4 is drilled through part-way into the ring 31 whereby a pipe cleaner may transect the annular orifice I9 cleansing it perfectly at this point. The tine 35 similarly transects the orifice I4 and for the same purpose.

Many modifications may be made without departing in any wise from the generic spirit of my invention and these modifications should be protected to me by the appended claims.

What I claim as new and useful and desire to protect by Letters Patent isz- 1. In a smoking pipe, a bowl, a cleaner knife coacting with the side walls of the bowl and means to rotate. the knife journaled axially of the bottom of the bowl and comprising an axially elongatable shank terminating in an external actuating head, which head is normally housed. within the bottom general contour of the pipe but when the shank is elongated is projected therebeyond for freedom of operation.

2. In a pipe, a bowl, a stem, an annular orifice in the bottom of the bowl in open communication with the stem, a movable bowl cleaner and orifice cleaning means carried by the bowl cleaner to thoroughly clean opposed walls of the orifice.

3. In a pipe, a bowl, a stem, an annular orifice in the bottom of the bowl constituting means of communication between the bowl and the stem, a rotary knife type bowl cleaner and a tine carried by the knife and projecting into the annular orifice to thoroughly clean opposed walls thereof at the same time the cleaner is rotated to clean the bowl.

4. In a pipe, a bowl, a bushing having its upper 75V end externally shouldered and its lower end in-v ternally shouldered, threaded axially into the .bottom of the bowl from the inside thereof to abut the bottom wall by its external shoulder, an externally shouldered shank journaled in said bushing to project out of the lower end thereof with its shoulder abutting the internal shoulder l of the bushing, a knife type bowl cleaner journaled in the upper end of said bushing and having a shank coupled to the said bushing shank in axial extensible relation, and means to retain the shouldered shank in the bushing and the knife shank in the shouldered shank against axial dis- 5 lodgment.

NORMAN K. J ELLINGHAUS. 

